We've spent plenty of time on this list drawing attention to Nicolas Cage's eccentric purchase history, but perhaps we should also be reserving special mentions for Justin Bieber. He's half Cage's age, and he's already racked up almost as many weird and expensive possessions as Cage has. In this case, he's lived out the dreams of many a child by buying his own custom-built real-life Batmobile.
The vehicle started life as a Cadillac CTS-V (which is already a nice car), but Bieber paid an additional $100,000 for the West Coast Customs company (who were famously the design team on 'Pimp My Ride') to give it a 'Batman' theme. That meant sticking the logo everywhere they could find space, making it jet black, and performing plenty of modifications to the interior. Bieber was only seventeen years old when he made the purchase; barely even old enough to drive it!